کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5400216 | 1505915 | 2014 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Energy transfer processes in Eu3+ doped nanocrystalline La2TeO6 phosphor
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Energy transfer processes in Eu3+ doped nanocrystalline La2TeO6 phosphor Energy transfer processes in Eu3+ doped nanocrystalline La2TeO6 phosphor](/preview/png/5400216.png)
چکیده انگلیسی
La2TeO6 nanocrystals doped with Eu3+ ions have been prepared by the Pechini sol-gel process. A total of seven samples obtained with different Eu3+ concentrations (1-7%). The Eu3+ ions are usually taken as probe ions to test the local structure of the lanthanide in solids. Analyzing the luminescence has been shown two different sites for the Eu3+ ions (in good agreement with the crystallographic analysis). Moreover, the luminescence properties have been analyzed as function of the Eu3+ doping concentration in order to study the interaction between these ions. Under direct excitation into the 5D0 level (at 578Â nm) the corresponding decay curves show a pure exponential character independently of the Eu3+ concentration. However, the decay curves obtained for the 5D1 level becomes non-exponential for the higher doped nanocrystals samples indicating that the energy transfer processes are important.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 145, January 2014, Pages 553-556
Journal: Journal of Luminescence - Volume 145, January 2014, Pages 553-556
نویسندگان
J. Llanos, R. Castillo, I.R. MartÃn, L.L. MartÃn, P. Haro-González, J. González-Platas,